Sawing-machine



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SEWING MACHINE.

No. 497,676. Patented May 16,1893.

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W. ELMO P PATT. 'SAWI'NG MACHINE.

N0. 49"7,676.' Patented May 16,1893.

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UNITED STATES PATENT OFFIQE.v

WILLIAM E. MOFFATT, OF CHESTER, SOUTH OAROLIN A.

SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 497,676, dated May 16,1893.

Application filed August 22, 1892. Serial No. 443,785. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM E. MoFFA'r'r, of Chester, in the county ofChester and State of South Carolina, have invented certain new anduseful Improvements in Sawing-Machines; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form part of thisspecification.

This invention relates to certain improvements in sawing machines.

The object of the invention is to provide an improved variable speed andreversing gear to drive the feed carriage exceedingly effective and surein operation and simple and durable in construction which can be easilyand quickly thrown into or out of gear, or reversed and wherein onesawyers lever can be employed to throw the speed gearing out of gear andto vary the speed thereof or to reverse the same.

A further object of the invention is to provide certain improvements indetails in construction and arrangement of parts whereby a highlyefficient and improved variable and reversing feed gear for saw mills isproduced.

The invention consists in certain novel features of construction and incombinations of parts more fully described hereinafter and particularlypointed outin the claims.

Referring to the accompanying drawings: Figure 1 is a top plan view ofthe sawing machine, the feed carriage and attachments not being shown.Fig. 2 is a side elevation. Fig. 3 is a section taken in plane of line50-00 Fig. 1, across the frame parallel with the axis of the sawmandrel. Fig. 4 is a detail section on the line yy Fig. 1 showing themOde'Of holding the saw mandrel at the desired angle or adjustment tovary the lead of the saw. Fig. 5 is a detail sectional View taken inplane of line zz parallel with the axis of the connecting shaft.

In the drawings, the reference letter a, indicates the frame of a sawmill.

1), indicates the saw mandrel having the saw collars c, for securing thesaw. This mandrel is mounted in the boxes 01 d on the frame beams. Theboxes directly rest on plates e e, secured on the beams of the frame andthese plates are rigidly connected by the the mandrel to vary the leadof the saw. The

inner box d of the mandrel hasadownwardly projecting central pivot h,from its under side, fittedin a corresponding socket or bearing in theface of a plate 6, of the metal frame, the projecting" ends of this box01 having curved segmental slots i, through which the securing boltsjextend. These bolts are secured to said metallic frame and have nuts ontheir upper ends so that the shaft mandrel and box can turn on the pivotwhen the nuts are loosened. The box d, for the opposite end of themandrel rests on the plate 6, of the metallic frame so as to slide backand forth thereon with the mandrel and this box and themandrel are heldin position by the horizontal screws 7",j", bearing against the ends ofthe box, and passed through threaded opening in vertical lugs is is,formed integral with the plate of the metallic frame. This is a simpleand most advantageousconstruction for adjusting and securing the mandrelin controlling the lead of the saw.

The mandrel driving pulley Z, is secured on the inner extremity of themandrel and the pulley is formed with a friction diskm on its outerside. This pulley is preferably cast with its outer end closed by astraight wall smooth on the outer side to form the friction disk orsurface m, at the end of the mandrel so that the friction Wheel n, canmove freely over any portion of said surface. The friction wheel 1,travels on and is driven from said disk to actuate the feed mechanism.-The friction wheel is mounted on the transverse connecting shaft 0,located at the side of the frame and connected by suitable gearing todrive the feed shaft 19, mounted in the main frame. This feed shaft isusually mounted in the frame parallel with the saw mandrel and has thecarriage driving pinion (1 on the same side of the frame as the saw. Theopposite end of the feed shaft is provided with the bevel gear 0',meshing with bevel pinion s, rigid on one end of the connecting shaft 0.The opposite end of the connecting shaft opposite the friction disk isprovided with a longitudinal groove t, preferably of substantially thesame length as the diameter of the friction disk. The friction wheel isprovided with a key it, fitted in said groove so that the wheel rotatesthe connecting shaft and can be readily moved longitudinally of theshaft the length of said groove and back and forth across the face ofthe friction surface or disk to vary the speed of the shaft or reversethe direction of rotation of the connecting shaft.

A standard or bracket 0. is rigidly secured to the main frame andextends upwardly over the mandrel driving pulley and at its upper end isprovided with a horizontal bearing 0' parallel with the saw mandrel. Ashaft 1) is mounted in and projects beyond the ends of said bearing. Oneend of the shaft is provided with the downwardly projecting crank arm ehaving the outwardly projecting perforated ears f. The friction wheelhub has a peripheral groove in which a loose collar g is fitted. Thiscollar has diametrically opposite bear ings in which the ends of theforked extension or rod h are journaled. The upper end of the rod passesthrough and works in the perforated ears f of the crank arm 6. Hencewhen the shaft 1) is rockedthe crank arm moving with it will throw therod 71. (which practically forms an extensible connection between thecrank and friction'wheel) which will move the friction wheellongitudinally of the connecting shaft across the friction face of thepulley. The rod h sliding back and forth in the perforated ears permitsthe circular motion of the shaft and crank being converted into thereciprocating movement of "the friction wheel.

The rock shaft which throws the friction wheel is rocked by the sawyerslever t" having a slot near one end in which the outer endof said shaftis pivoted. The shaft is rocked by swinging the lever vertically.

A bracket j is secured to the outer side of the main frame and has abearing is in which the carriage feed shaft is mounted. This bracketalso has an arm extending outwardly beyond the large gear on the end ofthe feed shaft. The bracket is here provided with an enlarged opening inwhich a journal box Z is mounted on pivots so as to rock laterally. Thelower end of the connecting shaft is mounted in this box Z so that theopposite end thereof is permitted to rock laterally and carry thefriction wheel to or away from the friction surface.

The bracket a isprovided with a horizontal stud or projection a"extending across the plane of the connecting shaft. A tube m is mountedon this stud so as to move longitudinally thereon. This tube or sleeve mis provided with a lateral projection having an enlarged opening inwhich a journal box n is mounted on pivots to swing laterally. Theconnecting shaft is mounted in this box a. A lever 0 is fulcrumed at itslower end to the bracket a to swing in a plane transverse to the axis ofthe connecting shaft and between its ends is connected by connections1), with the sliding sleeve m. This lever extends upwardly looselythrough an elongated vertical slot q in the sawyers lever.

The operation of the machine is obvious from the foregoing descriptionand the drawings. v

By swinging the sawyers lever laterally toward the connecting shaft saidshaftwill be swung laterally through the medium of the vertical lever 0,connection 12 and the sleeve. and will thereby carry the friction wheelaway from the face of the friction disk. The sawyers lever can then beswung vertically to move the friction wheel toward or from the center ofthe friction disk to vary the speed of the feed or from one side of thecenter of the friction disk to the other to reverse the direction of thefeed. When the wheel has been adjusted to the proper point the sawyerslever can be thrown inwardly to hold the friction'wheel to the frictiondisk.

The simplicity and durability'of the construction are evident.

The saw mandrel is provided withnothing but the saw collars and thedriving pulley which is a point of great advantage. The one pulleyserves todrive the saw mandreland to drive the feed mechanism, and asthe friction disk is located at the end of the shaft the friction wheelhas free movement. One lever only is required to control the speed, stopor reverse the feed carriage, and the friction wheel can be pressedagainst the friction disk with any degree of pressn re desired. But oneset of gears is employed between the saw mandrel and the carriage gear.

It is evident that various changes might be resorted to in the forms,constructions and arran gements of the parts described without departingfrom the spirit and scope of myinvention. Hence I do not wish to limitmyself to the construction here shown andspecifically described, butconsider myself entitled to all such changes as fall within the spiritand scope of my invention.

What I claim is- 1. In a sawing machine, the shaft having the frictiondisk, a carriage actuating shaft,

a bracket in which one end of said actuating shaft is mounted, aconnecting shaftat one end mounted in a pivoted box in said bracket andgeared to the actuating shaft, another bracket havinga stud, a sleevelongitudinally movable on said stud and provided with a pivoted box inwhich said connecting shaft is journaled, a friction wheellongitudinally movable on the connecting shaft, a sawyers leverconnected to said sleeve to swing the connecting shaft laterally, andconnections between said lever and said wheel to adjust the wheel.

2. In a sawing machine, the combination of a frame, a shaft having afriction disk, a shaft extending across the face of said disk and havinga longitudinal groove, the friction wheel traveling on said disk andhaving a key in said groove, a loose collar on the hub of said Wheel,abracket having a bearing above said shaft, arock shaft in the bearinghaving a lever anda crank arm,the extension of said crank armlongitudinally movable in relation thereto and having the end pivotallyconnected to said collar, substantially as described.

3. In combination, a,frame, a shaft having a friction disk, a laterallymovable shaft extending across the face of said disk and having theadjustable friction wheel on said disk, the bracket secured to theframe, a vertical lever secured to the bracket and connected to saidshaft to swing the same laterally, the sawyers lever having a slotthrough which said vertical lever extends, and connections from thesawyers lever to adjust said wheel, substantially as described.

4. In a sawing machine, the combination of the frame, the saw mandrelhaving the driving pulley on its outer end provided with a closed endforming the friction surface or face of the pulley, the feed shaft, theconnecting shaft geared to drive the feed shaft and extending across theface of said pulley and provided with a longitudinally movable frictionwheel to travel on the friction face of said pulley, said connectingshaft being mounted so as to move laterally toward and from the frictionface of said pulley, a sawyers lever, the rock shaft controlled by saidmandrel, the other end of the connecting shaft being mounted in amovable bearing, a sliding box for said shaft mounted on a suitablesupport, a lever connected to move said box laterally to throw theconnecting shaft in and out of gear with the saw mandrel, the sawyerslever connected or mounted to swing laterally and operate said lever tomove the 1 connecting shaft laterally, and connections from said leverto operate said friction wheel and the connecting shaft, substantiallyas set forth.

6. In a sawing machine, the combination of a frame, a saw mandrelprovided with a friction disk, a feed operating shaft, a connectingshaft geared to the feed operating shaft, and having a longitudinallymovable friction wheel to travel across the face of said friction diskof the saw mandrel, a pivoted box in which the outer end of saidconnecting shaft is journaled, a support, a sleeve movable on thesupport and carrying a pivoted box for the opposite portion of theconnecting shaft, a sawyers lever pivoted on suitable supports to movelaterally, a vertical lever connected with said sleeve to move the samelaterally and having its upper ends raised in relation to the sawyerslever so that the sawyers lever will swing the vertical lever when thesawyers lever is swung laterally, and means to move said friction wheel,substantially as set forth.

7. In a sawing machine, the combination of a frame, a saw mandrel havinga friction disk, a feed shaft, a connecting shaft geared or connected todrive the feed shaft extending across the face of the friction disk andprovided with a longitudinally movable friction wheel to engage saidfriction disk, a sawye'rs lever mounted on a suitable support, a rockshaft provided with a crank arm, a connection carried by andlongitudinally movable independent of the crank arm, and looselyconnected with said friction wheel to move the same longitudinally ofsaid shaft and connections between the sawyers lever and said rock shaftso that the rock shaft is rocked by the sawyers lever.

In testimony that I claim the foregoing as my own I affixvmy signaturein presence of two witnesses.

WILLIAM E. MOFFATT.

Witnesses:

B. M. SPRATT, JOSEPH WYLEE.

